/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.apache.jk.common;

import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;

import org.apache.jk.core.Msg;
import org.apache.jk.core.MsgContext;
import org.apache.tomcat.util.IntrospectionUtils;

/**
 * Shm implementation using JDK1.4 nio.
 * 
 * 
 * @author Costin Manolache
 */
public class Shm14 extends Shm {

	// Not ready yet.

	private static org.apache.juli.logging.Log log = org.apache.juli.logging.LogFactory
			.getLog(Shm14.class);

	MappedByteBuffer bb;

	public void init() {
		try {
			RandomAccessFile f = new RandomAccessFile(file, "rw");
			FileChannel fc = f.getChannel();

			bb = fc.map(FileChannel.MapMode.READ_WRITE, 0, f.length());
		} catch (IOException ex) {
			ex.printStackTrace();
		}
	}

	public void dumpScoreboard(String file) {
		// We can only sync with our backing store.
		bb.force();
		// XXX we should copy the content to the file
	}

	public void resetScoreboard() throws IOException {
		// XXX Need to write the head
	}

	public int invoke(Msg msg, MsgContext ep) throws IOException {
		if (log.isDebugEnabled())
			log.debug("ChannelShm14.invoke: " + ep);

		// 

		return 0;
	}

	public void initCli() {
	}

	public static void main(String args[]) {
		try {
			Shm14 shm = new Shm14();

			if (args.length == 0 || ("-?".equals(args[0]))) {
				shm.setHelp(true);
				return;
			}

			IntrospectionUtils.processArgs(shm, args);
			shm.execute();
		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}

}
